Bowl brush base



FIG. 1 is a perspective view of the bowl brush base according to the invention;

FIG. 2 is a front view of the bowl brush base as shown in FIG. 1;

FIG. 3 is a top view of the bowl brush base as shown in FIG. 1; and,

FIG. 4 is a bottom view of the bowl brush base as shown in FIG. 1. 

The ornamental design for a bowl brush base, as shown and described. 